- Thread starter ozone
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Many so-called 3 phase welders are actually single phase. My miller Dialarc is.
There's a panel on the side which you remove to access changeable jumpers for the relevant input voltage.
More info on the specific machine is needed to ascertain if it's possible or not.
There's a panel on the side which you remove to access changeable jumpers for the relevant input voltage.
More info on the specific machine is needed to ascertain if it's possible or not.
shenion
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You need to determine if it is 3-phase or just 415V.
My Miller MIG is 3-phase and could be jumpered for 220V. I have it running single-phase but it is not as good as it would be with 3-phase. I can get about 2/3 the rated current out of it. Arc is not as consistent but works.
Any transformer AC TIG will be single phase. May only be set up to run 415V though.
My Miller MIG is 3-phase and could be jumpered for 220V. I have it running single-phase but it is not as good as it would be with 3-phase. I can get about 2/3 the rated current out of it. Arc is not as consistent but works.
Any transformer AC TIG will be single phase. May only be set up to run 415V though.
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You really need to see the data plate, that will tell you input voltage, current and phase requirements as well as output voltage, current etc.
Best off finding the welder and putting full details of it on here for us to see, that way you'll avoid buying an unsuitable machine.
Data plate example, most useful bits you need to consider:
Symbol top left shows it's a mig welder. Next to that shows its a DC machine.
Far left, 3rd down 1~50/60Hz - single phase, 50 or 60Hz
35A/15.7V-120A/20V is the welding current and voltage range i.e volts during welding, not OCV (open circuit voltage). This shows that theoretically the machine has a minimum of 35 amps and maximum of 120 amps.
U0 - Output voltage (welding volts) - 21-41V DC open circuit volts, i.e no load.
U1 - Input voltage - 240V
Fuse symbol 13A says it wants a 13A fuse, I1max seems to show the peak input current is 26A though that seems very high for a little machine like that and if it is correct then it will probably only be very momentarily, not for long enough to blow the fuse or they'd be asking for a bigger one.
X%, I2, V2 is Duty cycle, weld at 120A on that machine and it gives you 10% so 1 min weld followed by 10 mins cooling down, at 40A it's 100% so you can weld non-stop.
Hope this helps.
Best off finding the welder and putting full details of it on here for us to see, that way you'll avoid buying an unsuitable machine.
Data plate example, most useful bits you need to consider:
Symbol top left shows it's a mig welder. Next to that shows its a DC machine.
Far left, 3rd down 1~50/60Hz - single phase, 50 or 60Hz
35A/15.7V-120A/20V is the welding current and voltage range i.e volts during welding, not OCV (open circuit voltage). This shows that theoretically the machine has a minimum of 35 amps and maximum of 120 amps.
U0 - Output voltage (welding volts
) - 21-41V DC open circuit volts, i.e no load.U1 - Input voltage - 240V
Fuse symbol 13A says it wants a 13A fuse, I1max seems to show the peak input current is 26A though that seems very high for a little machine like that and if it is correct then it will probably only be very momentarily, not for long enough to blow the fuse or they'd be asking for a bigger one.
X%, I2, V2 is Duty cycle, weld at 120A on that machine and it gives you 10% so 1 min weld followed by 10 mins cooling down, at 40A it's 100% so you can weld non-stop.
Hope this helps.
Ref. Wirefeed: even on a 3-phase machine, the wirefeed motor is typically low-voltage ( e.g 24v ) DC, driven via an electronic speed controller from the "auxiliary, wirefeed, and control" DC power supply. This power supply has a small transformer and rectifiers, and will usually take a single-phase input. A very few older MIGs had AC wirefeed motors, but again, they were single-phase motors.
thanks chaps,, that broadens my search by a long way,,great info and very well laid out for laymen like me,,,, 